package cn.itcast.reggie.controller;


import cn.itcast.reggie.common.R;
import cn.itcast.reggie.entity.Employee;
import cn.itcast.reggie.service.EmployeeService;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private EmployeeService employeeService;

    /**
     * 用户登录  http://localhost:8080/backend/page/login/login.html
     *
     * @param request
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee) {
        //1.将页面提交的密码password进行md5加密处理, 得到加密后的字符串
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //2.根据页面提交的用户名username查询数据库中员工数据信息
        LambdaQueryWrapper<Employee> qw = new LambdaQueryWrapper<>();
        qw.eq(Employee::getUsername, employee.getUsername());
        Employee emp = employeeService.getOne(qw);

        //3.如果没有查询到, 则返回登录失败结果
        if (emp == null) {
            return R.error("用户名不存在,登录失败");
        }

        //4.密码比对，如果不一致, 则返回登录失败结果
        if (!emp.getPassword().equals(password)) {
            return R.error("密码错误,登录失败");
        }

        //5.查看员工状态，如果为已禁用状态，则返回员工已禁用结果
        if (emp.getStatus() == 0) {
            return R.error("账户已禁用,登录失败");
        }
        //6 .登录成功，将员工id存入Session, 并返回登录成功结果
        request.getSession().setAttribute("employee", emp.getId());
        return R.success(emp);
    }

    /**
     * 用户退出
     *
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request) {
        //1.清理Session中保存的当前登录员工的id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

    /**
     * 用户新增
     *
     * @param request
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request, @RequestBody Employee employee) {
        log.info("新增员工，员工信息：{}",employee.toString());
//        1.在新增员工时， 按钮页面原型中的需求描述， 需要给员工设置初始默认密码 123456， 并对密码进行MD5加密。
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
//        2.在组装员工信息时, 还需要封装创建时间、修改时间，创建人、修改人信息(从session中获取当前登录用户)。
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//
//        Long empId = (Long) request.getSession().getAttribute("employee");
//
//        employee.setCreateUser(empId);
//        employee.setUpdateUser(empId);

        employeeService.save(employee);
        return R.success("新增员工成功");
    }

    /**
     * 员工分页查询
     * @param page 当前查询页码
     * @param pageSize 每页显示条数
     * @param name 员工姓名 - 可选参数
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page , int pageSize ,String name){
        log.info("page = {},pageSize = {},name = {}" ,page,pageSize,name);
        //构造分页构造器
        Page pageInfo = new Page(page,pageSize);
        //构造条件构造器
        LambdaQueryWrapper<Employee> qw = new LambdaQueryWrapper<>();
        //添加过滤条件
        qw.like(StringUtils.isNotEmpty(name),Employee::getName,name);
        //添加排序条件
        qw.orderByDesc(Employee::getUpdateTime);

        employeeService.page(pageInfo,qw);
        return R.success(pageInfo);
    }

    /**
     * 根据id修改员工信息
     * @param request
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request,@RequestBody Employee employee){
//        Long empId = (Long) request.getSession().getAttribute("employee");
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(empId);
        employeeService.updateById(employee);
        return R.success("员工信息修改成功");
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){

        Employee employee = employeeService.getById(id);
        if(employee != null){
            return R.success(employee);
        }
        return R.error("没有查询到对应员工信息");
    }
}
